Collapsible travel tumbler



FIG. 1 is a front perspective view of a collapsible travel tumbler showing our new design;

FIG. 2 is another front perspective view thereof;

FIG. 3 is a top view;

FIG. 4 is a bottom view;

FIG. 5 is a front side view;

FIG. 6 is a back side view;

FIG. 7 is a right side view; and,

FIG. 8 is a left side view. 

CLAIM The ornamental design for a collapsible travel tumbler, as shown. 